12-51
Module I/O Specifications
A25 Sum Loop
If difficulty is found measuring STEP_LP_OUT, set RF Generator to 250 MHz and use
oscilloscope settings from list shown below.
Outputs
From A26 Step Loop A
STEP_LP_OUT/A J3(17)
Frequency: 486 - 1015 MHz
Resolution: 100 kHz
Level: 3dB ±3 dB - on spectrum
analyzer
Waveshape sine
Channel 1 = 200.0 mvolts/div Offset = -24.00 mvolts Trigger mode: Edge on negative
edge on Chan2
Timebase = 500 ps/div Delay = 0.0000 s Trigger Levels
Ch. 1 Parameters P-P Volts = 1.1 volts Chan1 =-24.00 mvolts
Rise Time = 590 ps Fall Time = 620 ps Holdoff = 70.000 ns
Frequency = 483.092 MHz Period = 2.070 ns
+ Width = 1.060 ns - Width = 1.010 ns
Overshoot = 0.0000 mvolts Preshoot = 12.50 mvolts
RMS Volts = 1.617 volts Duty Cycle = 51.20%
To A26 Step Loop A
SUM_LOCK J2(1)
Level: TTL (High = Out of Lock)
High Typically + 7 Vdc
Low Typically < 0.3 Vdc
To A19 Measurement Board
AUX3_VM J2(6)
Level: -5 V to +5